[Vpn-help] Problem with VPN and RDP

[Martin Zürcher]

Hello list

I have a VPN connection from Shrew Soft VPN Client (2.1.4-release /
2.1.5-rc-2 on WinXP) to a D-Link DFL-200 Firewall (ipsec with preshared
keys). The connection works basically fine, so I can ping every host in
the remote Net, VNC connections works also without any problems to every
tested host (a few clients and two servers incl. terminal server) and
also connecting with net shares (samba) works correct.
The only thing that not works, is the RDP connecting for remote desktop
(Terminal Server). All tries to connect the terminal server results in
"connection timed out" / "No answer from server".

The strange thing: The RDP connections works fine when I connect the VPN
with the NCP Secure entry client instead of the shrew soft client. I
compared a lot of things from NCP to shrew and the only one difference
I've found was an additional entry in the routing table, generated by
NCP client (local adress 192.168.20.10, remote net 192.168.10.0)

shrew soft:
192.168.10.0    255.255.255.0     192.168.20.10    192.168.20.10
NCP:
192.168.10.0    255.255.255.0     192.168.20.10    192.168.20.10
192.168.10.0    255.255.255.0     192.168.20.11    192.168.20.10

I'am not shure about the causality of that difference but as I said,
this is the only one difference I've found.

Any (other) ideas?

Thanks in advance and greetings from switzerland
Martin